characteristic of a lack of maturity; immature behavior'

(used of living things especially persons) in an early period of life or development or growth; young people

[ Syn: young ]

not fully developed or mature; not ripe; unripe fruit; fried green tomatoes; green wood

[ Syn: green , unripe , unripened ]

not yet mature

(of birds) not yet having developed feathers; a small unfledged sparrow on the window sill

[ Syn: unfledged ]